Question

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For the year 2009, the table below gives the percent of people living below the poverty...

For the year 2009, the table below gives the percent of people living below the poverty line in the 26 states east of the Mississippi River. Answer the following questions based on this data. State Percent Alabama 7.5 Connecticut 7.9 Delaware 14.9 Florida 13.2 Georgia 12.1 Illinois 10.0 Indiana 9.9 Kentucky 11.9 Maine 13.3 Maryland 10.9 Massachusetts 7.9 Michigan 15.8 Mississippi 9.1 State Percent New Hampshire 14.6 New Jersey 8.3 New York 9.1 North Carolina 12.1 Ohio 13.6 Pennsylvania 10.5 Rhode Island 8.2 South Carolina 12.5 Tennessee 10.0 Vermont 7.3 Virginia 10.4 West Virginia 10.5 Wisconsin 16.1 Find the five-number summary for this data.

Solutions

Expert Solution

Five point summary

We get the data as:

STATE % OF PEOPLE
State Percent Alabama 7.5
Connecticut 7.9
Delaware 14.9
Florida 13.2
Georgia 12.1
Illinois 10
Indiana 9.9
Kentucky 11.9
Maine 13.3
Maryland 10.9
Massachusetts 7.9
Michigan 15.8
Mississippi 9.1
State Percent New Hampshire 14.6
New Jersey 8.3
New York 9.1
North Carolina 12.1
Ohio 13.6
Pennsylvania 10.5
Rhode Island 8.2
South Carolina 12.5
Tennessee 10
Vermont 7.3
Virginia 10.4
West Virginia 10.5
Wisconsin 16.1

We know that five point summary consists of minimum, maximum, median, Q1 and Q3.

To do the summary we have to sort the data firstly. After sorting we get:

7.3
7.5
7.9
7.9
8.2
8.3
9.1
9.1
9.9
10
10
10.4
10.5
10.5
10.9
11.9
12.1
12.1
12.5
13.2
13.3
13.6
14.6
14.9
15.8
16.1

Thus the minimum is 7.3 and maximum is 16.1.

As there are 26 data points median will be the mean of 13th and 14th observation.

So the median is: (10.5+10.5)/2 = 10.5.

Now Q1 and Q3 are respectively the midpoints of the two sides of the median.

We can write as:

(7.3,7.5,7.9,7.9,8.2,8.3,9.1,9.1,9.9,10,10,10.4,10.5) | (10.5,10.9,11.9,12.1,12.1,12.5,13.2,13.3,13.6,14.6,14.9,15.8,16.1)

So Q1= 9.1 and Q3= 13.2.


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